24 
Tne American Geologist. 
.laipuai-y, 1897 
>^ 
M 
;> 
o 
Q 
ca 
O 
Maquoketa 
SERIES. 
Wykoff 
formation. 
14. Orthis bed. 
13. Leptsena bed. 
Maquokefa 
formation. 
12. Orthoceras bed. 
11. Diplograptus bed. 
Ti'ansition 
formation. 
10. Triplecia bed. 
Galena 
SERIES. 
Galena 
formation. 
9. Maclurea bed. 
8. Lingulelasma bed. 
7. Camarella bed. 
6. Orthisina bed. 
Beloit 
formation. 
5. Fucoid bed. 
4. Stictopora bed. 
3. Stictoporella bed. 
2. Bellerophon bed. 
1. Buff limestone bed. 
Saint Peter sand 
stone (Chazy), 150 
'eet. 
Shakopee (Uppei 
Calciferous), 50 
feet. 
